docopt.net is the .net version of the docopt python beautiful command line parser. docopt.net helps you define an interface for your command-line app, and automatically generate a parser for it. docopt.net is based on conventions that have been used for decades in help messages and man pages for...
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A simple, but very powerful, command-line parsing utility that automatically populates properties in your argument object. Handles data type conversions and data validation. Provides help text optimized for the console. See the project WIKI on Git for full list of features and documentation.

Features a MVP framework largely inspired by WebFormsMvp. Contrary to WebFormsMvp, it is not restricted to the WebForms platform; nevertheless, featurewise, it should be on par with it.
Samples are available on the project web site.

Terse syntax C# command line parser for .NET. For FSharp support see CommandLineParser.FSharp. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.